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LPC55S2X датащи(PDF) 43 Page - NXP Semiconductors |
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LPC55S2X датащи(HTML) 43 Page - NXP Semiconductors |
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43 / 132 page ![]() LPC55S2x/LPC552x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2021. All rights reserved. Product data sheet Rev. 2.1 — 6 August 2021 43 of 132 NXP Semiconductors LPC55S2x/LPC552x 32-bit ARM Cortex-M33 microcontroller The on-chip ROM supports the following secure boot features: • Uses RSASSA-PKCS1-v1_5 signature of SHA256 digest as cryptographic signature verification • Supports RSA-2048 bit public keys (2048 bit modulus, 32-bit exponent) • Supports RSA-4096 bit public keys (4096 bit modulus, 32-bit exponent) • Uses x509 certificate format to validate image public keys • Supports up to four revocable Root of Trust (or Certificate Authority) keys, Root of Trust (RoT) establishment by storing the SHA-256 hash digest of the hashes of four RoT public keys in protected flash region (PFR) • Supports anti-rollback feature using image key revocation and supports up to 16 Image key certificates revocations using Serial Number field in x509 certificate. |
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